<?php /* *說明：函數功能是把一個圖像裁剪為任意大小的圖像，圖像不變形 * 參數說明：輸入 需要處理圖片的 文件名，生成新圖片的保存文件名，生成新圖片的寬，生成新圖片的高 * written by smallchicken * time 2008-12-18 */ // 獲得任意大小圖像，不足地方拉伸，不產生變形，不留下空白 function my_image_resize($src_file, $dst_file , $new_width , $new_height) { if($new_width <1 || $new_height <1) { echo "params width or height error !"; exit(); } if(!file_exists($src_file)) { echo $src_file . " is not exists !"; exit(); } // 圖像類型 $type=exif_imagetype($src_file); $support_type=array(IMAGETYPE_JPEG , IMAGETYPE_PNG , IMAGETYPE_GIF); if(!in_array($type, $support_type,true)) { echo "this type of image does not support! only support jpg , gif or png"; exit(); } //Load image switch($type) { case IMAGETYPE_JPEG : $src_img=imagecreatefromjpeg($src_file); break; case IMAGETYPE_PNG : $src_img=imagecreatefrompng($src_file); break; case IMAGETYPE_GIF : $src_img=imagecreatefromgif($src_file); break; default: echo "Load image error!"; exit(); } $w=imagesx($src_img); $h=imagesy($src_img); $ratio_w=1.0 * $new_width / $w; $ratio_h=1.0 * $new_height / $h; $ratio=1.0; // 生成的圖像的高寬比原來的都小，或都大 ，原則是 取大比例放大，取大比例縮小（縮小的比例就比較小了） if( ($ratio_w < 1 && $ratio_h < 1) || ($ratio_w > 1 && $ratio_h > 1)) { if($ratio_w < $ratio_h) { $ratio = $ratio_h ; // 情況一，寬度的比例比高度方向的小，按照高度的比例標准來裁剪或放大 }else { $ratio = $ratio_w ; } // 定義一個中間的臨時圖像，該圖像的寬高比 正好滿足目標要求 $inter_w=(int)($new_width / $ratio); $inter_h=(int) ($new_height / $ratio); $inter_img=imagecreatetruecolor($inter_w , $inter_h); imagecopy($inter_img, $src_img, 0,0,0,0,$inter_w,$inter_h); // 生成一個以最大邊長度為大小的是目標圖像$ratio比例的臨時圖像 // 定義一個新的圖像 $new_img=imagecreatetruecolor($new_width,$new_height); imagecopyresampled($new_img,$inter_img,0,0,0,0,$new_width,$new_height,$inter_w,$inter_h); switch($type) { case IMAGETYPE_JPEG : imagejpeg($new_img, $dst_file,100); // 存儲圖像 break; case IMAGETYPE_PNG : imagepng($new_img,$dst_file,100); break; case IMAGETYPE_GIF : imagegif($new_img,$dst_file,100); break; default: break; } } // end if 1 // 2 目標圖像 的一個邊大於原圖，一個邊小於原圖 ，先放大平普圖像，然后裁剪 // =if( ($ratio_w < 1 && $ratio_h > 1) || ($ratio_w >1 && $ratio_h <1) ) else{ $ratio=$ratio_h>$ratio_w? $ratio_h : $ratio_w; //取比例大的那個值 // 定義一個中間的大圖像，該圖像的高或寬和目標圖像相等，然后對原圖放大 $inter_w=(int)($w * $ratio); $inter_h=(int) ($h * $ratio); $inter_img=imagecreatetruecolor($inter_w , $inter_h); //將原圖縮放比例后裁剪 imagecopyresampled($inter_img,$src_img,0,0,0,0,$inter_w,$inter_h,$w,$h); // 定義一個新的圖像 $new_img=imagecreatetruecolor($new_width,$new_height); imagecopy($new_img, $inter_img, 0,0,0,0,$new_width,$new_height); switch($type) { case IMAGETYPE_JPEG : imagejpeg($new_img, $dst_file,100); // 存儲圖像 break; case IMAGETYPE_PNG : imagepng($new_img,$dst_file,100); break; case IMAGETYPE_GIF : imagegif($new_img,$dst_file,100); break; default: break; } }// if3 }// end function ?>
第二個方法：
<?php /* 圖片處理類：縮略，裁剪，圓角，傾斜 */ class resizeimage { //圖片類型 var $type; //實際寬度 var $width; //實際高度 var $height; //改變后的寬度 var $resize_width; //改變后的高度 var $resize_height; //是否裁圖 var $cut; //源圖象 var $srcimg; //目標圖象地址 var $dstimg; //圓角源 var $corner; var $im; function resizeimage($img, $corner, $wid, $hei,$c, $corner_radius, $angle) { $this->srcimg = $img; $this->corner = $corner; $this->resize_width = $wid; $this->resize_height = $hei; $this->cut = $c; $this->corner_radius = $corner_radius; $this->angle = $angle; //圖片的類型 $this->type = substr(strrchr($this->srcimg,"."),1); //初始化圖象 $this->initi_img(); //目標圖象地址 $this -> dst_img(); //-- $this->width = imagesx($this->im); $this->height = imagesy($this->im); //生成圖象 $this->newimg(); ImageDestroy ($this->im); } function newimg() { //改變后的圖象的比例 $resize_ratio = ($this->resize_width)/($this->resize_height); //實際圖象的比例 $ratio = ($this->width)/($this->height); if(($this->cut)=="1") //裁圖 { if($ratio>=$resize_ratio) //高度優先 { $newimg = imagecreatetruecolor($this->resize_width,$this->resize_height); imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width,$this->resize_height, (($this->height)*$resize_ratio), $this->height); $tmp = $this->rounded_corner($newimg,$this->resize_width); imagepng ($tmp,$this->dstimg); } if($ratio<$resize_ratio) //寬度優先 { $newimg = imagecreatetruecolor($this->resize_width,$this->resize_height); imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width, $this->resize_height, $this->width, (($this->width)/$resize_ratio)); $tmp = $this->rounded_corner($newimg); imagepng ($tmp,$this->dstimg); } } else //不裁圖 { if($ratio>=$resize_ratio) { $newimg = imagecreatetruecolor($this->resize_width,($this->resize_width)/$ratio); imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width, ($this->resize_width)/$ratio, $this->width, $this->height); ImageJpeg ($newimg,$this->dstimg); } if($ratio<$resize_ratio) { $newimg = imagecreatetruecolor(($this->resize_height)*$ratio,$this->resize_height); imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, ($this->resize_height)*$ratio, $this->resize_height, $this->width, $this->height); ImageJpeg ($newimg,$this->dstimg); } } } //初始化圖象 function initi_img() { if($this->type=="jpg") { $this->im = imagecreatefromjpeg($this->srcimg); } if($this->type=="gif") { $this->im = imagecreatefromgif($this->srcimg); } if($this->type=="png") { $this->im = imagecreatefrompng($this->srcimg); } } //處理圓角 function rounded_corner($image,$size) { $this->angle = 0; $topleft = true; $bottomleft = true; $bottomright = true; $topright = true; $corner_source = imagecreatefrompng('rounded_corner.png'); $corner_width = imagesx($corner_source); $corner_height = imagesy($corner_source); $corner_resized = ImageCreateTrueColor($this->corner_radius, $this->corner_radius); ImageCopyResampled($corner_resized, $corner_source, 0, 0, 0, 0, $this->corner_radius, $this->corner_radius, $corner_width, $corner_height); $corner_width = imagesx($corner_resized); $corner_height = imagesy($corner_resized); $white = ImageColorAllocate($image,255,255,255); $black = ImageColorAllocate($image,0,0,0); //頂部左圓角 if ($topleft == true) { $dest_x = 0; $dest_y = 0; imagecolortransparent($corner_resized, $black); imagecopymerge($image, $corner_resized, $dest_x, $dest_y, 0, 0, $corner_width, $corner_height, 100); } //下部左圓角 if ($bottomleft == true) { $dest_x = 0; $dest_y = $size - $corner_height; $rotated = imagerotate($corner_resized, 90, 0); imagecolortransparent($rotated, $black); imagecopymerge($image, $rotated, $dest_x, $dest_y, 0, 0, $corner_width, $corner_height, 100); } //下部右圓角 if ($bottomright == true) { $dest_x = $size - $corner_width; $dest_y = $size - $corner_height; $rotated = imagerotate($corner_resized, 180, 0); imagecolortransparent($rotated, $black); imagecopymerge($image, $rotated, $dest_x, $dest_y, 0, 0, $corner_width, $corner_height, 100); } //頂部右圓角 if ($topright == true) { $dest_x = $size - $corner_width; $dest_y = 0; $rotated = imagerotate($corner_resized, 270, 0); imagecolortransparent($rotated, $black); imagecopymerge($image, $rotated, $dest_x, $dest_y, 0, 0, $corner_width, $corner_height, 100); } $image = imagerotate($image, $this->angle, $white); return $image; } //圖象目標地址 function dst_img() { $full_length = strlen($this->srcimg); $type_length = strlen($this->type); $name_length = $full_length-$type_length; $name = substr($this->srcimg,0,$name_length-1); $this->dstimg = $name."_small.png"; } } //resizeimage("圖片地址", "處理后的寬度", "處理后的高度", "是否裁剪", "圓角度數", "傾斜度"); $img_file = 'Sunset.jpg'; $corner = 'rounded_corner.png'; $resizeimage = new resizeimage($img_file, $corner, "80", "80", "1", "6", "0"); ?> <img src="Sunset_small.png" border="0">